The current mantra in education is "technology, technology, technology." Many teachers and prospective teachers become frustrated with their lack of knowledge regarding the "appropriate" use of technology in the classroom. Prospective teachers need training in their education to understand how technology can be used "appropriately" in the mathematics classroom. This article describes the design and implementation of a technology-based mathematics lesson presented by a pre-service secondary mathematics education student enrolled in a mathematics modelling and problem solving undergraduate course. During the course, students in the class were required to design and deliver a mathematics lesson of their choosing incorporating technology of their choice. In addition to presenting their lessons, the presenters were required to defend the "appropriateness" of their chosen technology. (Contains 6 figures.)